Every new play that runs for more than three months is either a commercial or a critical success.
Conclusion (Therefore)
Every new play that ran for more than three months last year was a commercial success.
Evidence
Every new play that runs for more than three months is either a commercial or a critical success.
Last year, all new plays that were critical successes were also commercial successes.
Evaluate
Since this argument has some conditional logic (every, all, every) and repeating language in it, we should probably look at the algebraic recipe of the logic. We know that all three ingredients are conditionals, so any answer that doesn't have three conditional ingredients should be wrong.
P1: Every new play that runs A + X → B or C 3+ mos is comm or crit succ
P2: All new plays that were A + C → B crit succ were comm succ
C: Every new play that runs A + X → B 3+ mos is comm succ
The algebra here is tricky since all three claims are about "new plays", but a specific subset of "new plays".
One premise and the conclusion are about "New plays that run for 3+ months". The other premise is about "New plays that are critical successes".
It might be easier to think about this one conversationally.
P1: If you're A, then you're B or C P2: But if you're C, then you're also B. C: So if you're A, you're destined to be B.
Goal
Look for a conditional premise that offers us some "B or C" in the outcome. Then look for a second conditional premise that makes it seem like "one of those two options implies the other". Thus, you're bound to be the implied option either way.